Abstract

In coherent-optical transmission systems continuous or endless polarization matching between the superposed beams must be ensured. We describe a practical closed-loop polarization-control system with two integrated-optical retarders acting as polarization transformers. They have variable retardations and variable eigenmodes, i.e., adjustable birefringence magnitude and orientation as in a Babinet–Soleil compensator. In theory, one retarder would be sufficient. However, a second device is added to correct nonideal behavior of the first. The intensity losses during polarization control are less than 0.15 dB.

R. Noé, in Proceedings of the 13th European Conference on Optical Communications (Consulting Committee of the Professional Electroengineers’ Organizations in Finland, Helsinki, 1987), Vol. 1, pp. 371–374.

R. Noé, in Proceedings of the 13th European Conference on Optical Communications (Consulting Committee of the Professional Electroengineers’ Organizations in Finland, Helsinki, 1987), Vol. 1, pp. 371–374.

R. Noé, in Proceedings of the 13th European Conference on Optical Communications (Consulting Committee of the Professional Electroengineers’ Organizations in Finland, Helsinki, 1987), Vol. 1, pp. 371–374.

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